Method of treating fibrous materials



' citizen of the United :States, residing at are. well coated, aftergwhichfit' is taken from v rmrrso,sr-AiTEsv PATENT QFFICE.

I fwrnLrnm wnrman, or nrrnnrron, isconsin.

fianrnonong'rnna'r .innons MATERIALS.

I I Specification No Drawing. Application filed i To all whom it may concern: "J

Be it known that 1, WILLIAM: Wnmmmfa Appleton, in the county of Outagamie and the treated wood, to a dark brown or black,

State of Wisconsin, have inventedcertain new, and useful Improvements-in Methods of Treating Fibrous Materials','of -which:the

following is a specification.

This invention relates to; processes y-for treatment of fibrous material, such as wood or the like. 7 i One of the objects of the invention is to,

provide an improved process for the treatment of wood, ,wood pulp or fiber, fiben board, card board and other similar substances or material whereby to-renderithem 7 water proof, weather proof, and substantially immune from the effect of dry rot, vegetable fungoid and microbicorganisms. Another object is to change the color'of to enhance its appearance and to improve its texture.

' Another. object is to remove any .objectionable odors from the treated material.

Another object is to render the treated wood, or similar fibrous material more plastic, or less brittle, and to 'fill' thePores so that it will take on a higherfinish or polish.

Other, further and more specific objects of the invention will become readily apparent, to persons skilled inthe art, from "a consideration of the following description. i The objectsought'in carrying the invention into'efi'ect is to drive out of the'pores of the wood any resident content and then to coat. the: pores with a liquid preservative r and finally to fill them with the preserving I and insulating compound. The mode ofprocedure issubstantially as follows '1 The bodies of wood, or pieces of suitable pores.

sizes, are first immersed in a twenty per The solution is maintained hot and the wood should remain in the solution, preferably, twenty-four hours, or until the solution has thoroughly ,impregnated the wood body. The wood may first have been kiln dried or green wood may be used if the preserving solution is heated sufficiently above the boiling point. This will drive out the sap and allow the entrance of the solution into the From this solution the wood is removed and allowed to dry, or is dried superficially.

Iss0 serial: No. 35e,5s4.:-

in-hot hydro-carbonv liquid, until the pores the hydro-carbon and allowed to dry until 7 1t 1s no'longe'r sticky It is then placed in a vat or other suitable Ireceptaclecontain- .lng h'otor molten sulfur and resin., I have {found that-sufficient sulfur should-Ibo used to. submerge. v.thewood and that; very good resultsmaybe obtained from {the resin of commercetabout one per cent; in weight, of the sulfur, or ninety per cent.v of sulfur and onedper cent. of resin may be satisfactorily use 'Tlie. fibrous material should be maintained in this last mentioned heated solution until Patented A pr. 19, 1921.

it assumes the desired color and weight. g

The time required for this treatment depends, to some extent,. upon the character wood, the time that it shall remain in the heated sulfur and resin solution, varies from three to seven-day's.

After the, substance has been cooked in the sulfur solution, for-the requisite period 0f time, it is then; taken out and rapidly cooled. This mayconveniently be done by immersing it in cold water or by directing a. stream of cold water upon it. This has the effect of converting the sulfur into a plastic state rendering the treated body less brittle than it would-otherwise be if allowed to cool slowly. Theproduct is practically odorless and possesses desirable qualities of higher priced ,materiali'i Wood pulp, or other fibrous material, may be treated-in the mannerdescribed and subsequentlymolded into suitable forms, to provide various articles of manufacture.

While I have herein described my process in minute detail, it will be manifest that changes in this specific manner of carrying the invention into efiect may be made within 100 the scope of the appended claim,-

Having described the inventlon what I claim as new and desire to secure by Letters Patent is:-

The process of treating fibrous material 105 sodium carbonate, to drive out resident con tent from the pores; then removing it from the solution and drying it; then immersing it in a hot hydro-carbon liquid to neutralize the odor produced by the sulfur and to expand the pores; then drying it; then placing it in a solution of sulfur and resin of commerce and maintaining it at temperature sufficient to keep the sulfur in a molten state until the pores of the fibrous material are sufficiently filled, then removing the material from the vat and suddenly cooling it. 10

In testimony whereof I hereunto subscribe my name.

WILLIAM WEIMAR. 

